The 40-FLXP-R19-H is a rack-mount kit for Sun's FlexiPack product. The kit allows FlexiPack devices to be securely mounted into a 19" EIA standard computer cabinet in only 4 RU (RU=1.75") of computer cabinet space. The kit has a flexible mounting depth range of 24" to 36.5", and devices can be accessed without having to move the kit.

Either one or two FlexiPack devices can be loaded onto the kit side by side. If only one device is to be racked, an included panel fills the hole where the second device would normally be seen, creating an overall cleaner presentation. The kit's color scheme matches that of the FlexiPack devices.